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HOBO MX1102A Bluetooth CO2/Temp/RH Sensor Data Logger

Brand: Onset HOBO
Product Code: MX1102A
HOBO MX1102A Bluetooth CO2/Temp/RH Sensor Data Logger

Regular Price: £698.13

Special Price Ex VAT £609.28 Inc VAT £731.14

Availability: In stock

SKU: MX1102A

Product Description

The Onset HOBO MX1102A CO2 data logger with built-in CO2 sensor makes it even easier to measure and record carbon dioxide levels in buildings and other non-condensing environments. Measuring CO2 from 0 –5,000 parts per million (ppm), and using the free HOBOmobile app* allows you to access data right from your mobile phone or tablet within a 100-foot range.

In addition to Bluetooth Low Energy (BLE); the MX1102A also features a USB port, so it can be used with a computer running HOBOware graphing and analysis software. 

The HOBO MX CO2 meter & data logger records and transmits carbon dioxide, temperature, and relative humidity (RH) data in indoor environments using non-dispersive infrared (NDIR) self-calibrating CO2 sensor technology and integrated temperature and RH sensors. 

Designed for easy deployment, the HOBO MX1102A features an easy-to-read LCD that displays current readings and logger status, visual and audible high & low alarm thresholds, and can run for six (6) months on four (4) user-replaceable AA batteries.

The HOBO MX1102A is an ideal choice for UK housing associations needing to carry out passive house audits/monitoring of CO2.

* Download the free HOBOmobile application for your iOS or Android mobile device. Minimum System Requirements: iOS 9.2, 9.3, 10.x. Android 4.4, 5.0, 5.1, 6.0.1. Bluetooth 4.0

Measurements: The MX1102A Data Logger supports the following measurements: CO2, Temperature, Relative Humidity


Call +44 (0)1243 558270, click on the webchat box below, or fill out our contact form.

Regular Price: £698.13

Special Price Ex VAT £609.28 Inc VAT £731.14

Additional Information

Additional Information


To see the full specifications for this product, please see our product manual found under the Resources tab.

Temperature Sensor


0° to 50°C (32° to 122°F)


±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F)


0.024°C at 25°C (0.04°F at 77°F)


<0.1°C (0.18°F) per year


RH Sensor


1% to 90% RH (non-condensing)


±2% from 20% to 80% typical to a maximum of ±4.5% including hysteresis at 25°C (77°F); below 20% and above 80% ±6% typical




<1% per year typical


CO2 Sensor


0 to 5,000 ppm


±50 ppm ±5% of reading at 25°C (77°F), less than 70% RH and 1,013 mbar

Warm-up Time

15 seconds


Auto or manual to 400 ppm


<1% of FS

Pressure Dependence

0.13% of reading per mm Hg (corrected via user input for elevation/altitude)

Operating Pressure Range

950 to 1,050 mbar (use Altitude Compensation for outside of this range)

Compensated Pressure Range

-305 to 5,486 m (-1,000 to 18,000 ft)

Sensing Method

Non-dispersive infrared (NDIR) absorption


Response Time


12minutes to 90% in airflow of 1 m/s (2.2 mph)


1 minute to 90% in airflow of 1 m/s (2.2 mph)


1 minute to 90% in airflow of 1 m/s (2.2 mph)



Radio Power

1 mW (0 dBm)

Transmission Range

Approximately 30.5 m (100 ft) line-of-sight

Wireless Data Standard

Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)

Logger Operating Range

0° to 50°C (32° to 122°F); 0 to 95% RH (non-condensing)

Logging Rate

1 second to 18 hours

Logging Modes

Fixed interval (normal, statistics) or burst

Memory Modes

Wrap when full or stop when full

Start Modes

Immediate, push button, date & time, or next interval

Stop Modes

When memory full, push button, date & time, or after a set logging period

Time Accuracy

± 1 minute per month at 25°C (77°F)

Power Source

4 AA 1.5 Volt batteries (user replaceable) or USB power source (5 V DC, 2 Watts) 

Battery Life

6 months, typical with logging and sampling intervals of 5 minutes or slower; 6 months or less with logging and sampling intervals faster than 5 minutes while logging CO2. Entering burst logging mode will impact battery life. With HOBOmobile use, battery life can be reduced by remaining connected, excessive readouts, checking of Full Status Details, audible alarms, and paging. Visual/audible alarms and other events can have a marginal impact on battery life.


128 KB (84,650 measurements, maximum)

Download Type

USB 2.0 interface or via Bluetooth Smart

Full Memory Download Time

20 seconds via USB; approximately 60 seconds via Bluetooth Smart, may take longer the further the device is from the logger


LCD is visible from 0° to 50°C (32° to 122°F); the LCD may react slowly or go blank in temperatures outside this range


7.62 x 12.95 x 4.78 cm (3.0 x 5.1 x 1.88 inches)


267.4 g (9.43 oz)

Environmental Rating


The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

Country of Manufacture United States
Channel(s) 2
Onset Product Series MX1100
Typical Applications Building Monitoring, Energy, Environmental (Indoor), Thermal Comfort
Data Available By Bluetooth, Display, USB
Measurements CO2, Humidity, Temperature

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